Circular DNA molecules purified from both bacteria and eukaryotes are usually negatively supercoiled, having values of s of approximately –0.06.

TLS Online TPP Program

#Id: 7027

#Unit 11. Evolution and Behavior

Proximate causes - The subject of cell biology, neurobiology, and many other biological disciplines

Ultimate causes - Their historical causes, especially the action of natural selection

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#Id: 7374

#Unit 5. Developmental Biology

Gurken protein is a member of the EGF (epidermal growth factor) family, and Torpedo encodes a homologue of the vertebrate EGF receptor.

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#Id: 8147

#Unit 2. Cellular Organization

A clathrin molecule,

called a triskelion, is composed of : 

Three heavy chains

Three light chains

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#Id: 3878

#Unit 5. Developmental Biology

Prestalk cells act as altruists which die for dispersion of kin cells.

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#Id: 1165

#Unit 7. System Physiology – Animal

Factors governing filtration across the glomerular capillaries:

1. Size of the capillary bed

2. Permeability of the capillaries

3. Hydrostatic and osmotic pressure gradients across the capillary wall